Notes On Limit Entries In General - IET Labs, Inc. RLC Digibridge 1693 User And Service Manual

1693 RLC Digibridge
NOTE: Because there are overlaps, bin numbers
affect the binning (if a DDT satisfies two bins, it
goes into "the lower-numbered bin"): for example,
1.046 µF will go into the 1.0-uF bin (No.2) because it
is numbered lower than the 1.1-µF bin (No.3).
Method 2, using one nominal value for the set of bins.
Advantage: All bin limits are related to the same
nominal value, making it easy to define bins exactly
adjacent to each other without overlaps or gaps.
Disadvantage: Each bin is not readily defined in
terms of its own nominal value.
Example: For sorting capacitors into six adjacent
"1%" bins from -3% to +3%, setting D < .005, and
nominal value of the six bins at Cs = 1.0 µF.
1. With [FUNCTION] key, select ENTER.
2. With [EQUIVALENT CIRCUIT] key, select
SERIES.
3. With parameter key [Cs/D], select units: µF.
4. Enter D limit: [.][0][0][5][=][SHIFT][BIN
No.][0][0].
5. Enter nominal C value: [1][=][SHIFT][NOM
VALUE].
6. Set bin 1 limits: [-][2][%][-][3][%][=]
[SHIFT][BIN No.][0][l].
7. Set bin 2 limits: [-][1][%][-][2][%][=]
[[SHIFT]BIN No.][0][2].
8. Set bin 3 limits: [0][%][-][l][%][=][SHIFT]
[BIN No.][0][3].
9. Set bin 4 limits: [l ][%][0][%][=][SHIFT]
[BIN No.][0][4].
10. Set bin 5 limits: [2][%][1][%][=][SHIFT]
[BIN No.][0][5].
11. Set bin 6 limits: [3][%][2][%][=][SHIFT]
[BIN No.][0][6].
12. Close bin 7 (if open): [0][%][=][SHIFT][BIN
No.][0][7].
13. Close bins 8 through 13, similarly (if used
before).
NOTE: For any bin the less negative or more positive
percentage must be entered first as shown clearly in
steps 6 and 11. Because there are no overlaps, there
will be no "default assignment to the lower-numbered
bin". Bin number sequence is immaterial.
66
3.8.6 Notes on Limit Entries in
General
For additional detail, refer to the condensed instruc-
tions on the reference card under the Digibridge, and
to the following notes.
Frequency. It is NOT necessary to select the test
frequency first. Comparison results are valid even
if the test frequency is changed later in the entry/
measurement procedure.
Bin 0. The limit entered in bin 0 is always QDR. It is
an upper or lower limit on the secondary measured
value, depending on the parameter selection, as
tabulated:
Rs/Q (upper) Ls/Q (lower)
Rp/Q (upper) Lp/Q (lower)
Unsymmetrical Limit Pairs. Enter 2 percentages for
the bin. One or both may be + (unspecified sign) or
-. Enter first the one that yields the larger absolute
value of RLC.
Unused Bins. Initially, at power-up, bins 1 through 13
are closed so that unused ones can be ignored . Every
unused bin that has previously been used (except
14) must be closed by entering 0%, as in the above
examples. Once closed, it will stay closed until non-
zero percent limits are inserted.
Allowable Limits. Max of 6 significant figures for
nominal value and percent up to 99999.9. Bin Order.
Optional except for nested bins; be sure the narrower
limit pairs go into lower numbered bins (because all
overlap goes to the lower numbered bin).
Inhibiting Comparisons. To inhibit all comparisons,
set nominal value to zero. (Then GO/NO-GO indica-
tors stay off.) Subsequent setting of nominal value to
any number except zero enables all comparisons as
previously set up. To inhibit QDR comparisons, set
bin 0 to the "all-pass" extreme, i.e., to 0000 for Rp,
or Q with L; to 9999 for D or Rs or Q with R.
Cs/D (upper) Cs/Rs (upper)
Cp/D (upper) Cp/Rp (lower)
Operation